I’m wondering if there are any users who have used MVR evaporators to concentrate wastewater containing sodium chloride and similar substances. Everyone is welcome to share their experiences and discuss this topic

Sodium chloride is common! Sodium nitrate can be concentrated to a certain level! Sodium fluoride has a high boiling point, so there should be no problem with MVR!

It’s written too generally to be discussed. . .

We use centrifugal compressors; wastewater is fed into the system, with the liquid phase temperature maintained at around 85 degrees and the vacuum level controlled at 52 Kpa. The system performs well in terms of water evaporation, and it is also quite stable. When the plant is shut down, salt production continues as usual. However, when the plant is restarted, the compressor experiences surge phenomena and cannot operate. The designers suggested that the centrifugal mother liquor should be returned to the system, which leads to an accumulation of sodium nitrate and has a significant impact on the system; therefore, it is necessary to periodically discharge this liquid and then evaporate it using a reaction vessel. I’d like to ask if there are any other reasons caused by Haiyou that led to system instability? I have just started working with MVR; I would appreciate a lot of guidance from experienced users.

We use centrifugal compressors; wastewater is fed into the system, with the liquid phase temperature maintained at around 85 degrees and the vacuum level controlled at 52 Kpa. The system performs well in terms of water evaporation, and it is also quite stable. When the plant is shut down, salt production continues as usual. However, when the plant is restarted, the compressor experiences surge phenomena and cannot operate. The designers suggested that the centrifugal mother liquor should be returned to the system, which leads to an accumulation of sodium nitrate and has a significant impact on the system; therefore, it is necessary to periodically discharge this liquid and then evaporate it using a reaction vessel. I’d like to ask if there are any other reasons caused by Haiyou that led to system instability? I have just started working with MVR; I would appreciate a lot of guidance from experienced users.

Check out the document for the specific operating procedures!

I want to send it too, but the company’s documents are encrypted, so I can’t send them

For such a system, what are the factors that cause compressor surge? What further modifications are needed to its system?

For such a system, what are the factors that cause compressor surge? What further modifications are needed to its system?

It works normally, but after it stops, it doesn’t function properly when started again – is that the case? Based on this analysis, the main issue is that the boiling point within the system has increased; initially, evaporation can occur at 85°C, but after some time, 90°C may be required for evaporation to take place.